'Water pimpernel' definitions:

Definition of 'water pimpernel'

(from WordNet)
noun
A white-flowered aquatic plant of the genus Samolus

Definition of 'Water pimpernel'

From: GCIDE
  • Pimpernel \Pim"per*nel\, n. [F. pimprenelle; cf. Sp. pimpinela, It. pimpinella; perh. from LL. bipinnella, for bipinnula two-winged, equiv. to L. bipennis; bis twice + penna feather, wing. Cf. Pen a feather.] (Bot.) A plant of the genus Anagallis, of which one species (Anagallis arvensis) has small flowers, usually scarlet, but sometimes purple, blue, or white, which speedily close at the approach of bad weather. [1913 Webster]
  • Water pimpernel. (Bot.) See Brookweed. [1913 Webster]

Definition of 'Water pimpernel'

From: GCIDE
  • Water pimpernel \Wa"ter pim"per*nel\ (Bot.) A small white-flowered shrub; brookweed. [1913 Webster]